Long run. Target no more than a 1-2 mile increase on long runs each week and total weekly mileage of not more than a 10% increase each week. Limit this run to no more than 3:30 - 4:00 hrs. regardless of distance. Drink sufficient fluids for long runs (drink at least every 30 minutes) and ensure your body has enough electrolytes coming in either through electrolytes in your drink or gels or other form. Eat gels for energy and practice eating gels as you would during a race to nail down your plan of quantity and timing for gels. This will also enable yout to see how your body reacts to gels and hydration prior to race day.